Food restriction alters pregnancy-associated changes in IGF and IGFBP in the guinea pig

A. Sohlström, A. Katsman, K. L. Kind, C. T. Roberts, P. C. Owens, J. S. Robinson, J. A. Owens

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Abstract

The effect of moderate food restriction on pregnancy-associated changes in weight gain, body composition, and circulating insulin-like growth factors (IGF) I and II and IGF-binding proteins (IGFBP)-1 through -4 and their relationship was determined in the guinea pig. Pregnancy did not stimulate weight gain but reduced fat deposition in ad libitum-fed animals and increased weight gain and fat deposition in food-restricted animals relative to their respective virginal group. Pregnancy increased the abundance of circulating IGF-I regardless of food intake and increased that of IGF-II in food-restricted animals only. Pregnancy also increased circulating IGFBP-1 and -2 in ad libitum-fed and food-restricted animals and IGFBP-4 in ad libitum-fed animals. Multiple regression analysis showed that maternal weight gain was negatively associated with circulating IGF-II and IGFBP-2. Fetal weight was positively associated with maternal circulating IGF-II and negatively associated with maternal circulating IGFBP-1 and -2. Significant interactions indicate, however, that the role of IGF-II and IGFBP-1 on fetal growth is dependent on the nutritional status of the mother.

Original languageEnglish
Pages (from-to)E410-E416
JournalAmerican Journal of Physiology - Endocrinology and Metabolism
Volume274
Issue number3 37-3
Publication statusPublished - 1 Mar 1998
Externally publishedYes

Keywords

  • Insulin-like growth factor-binding proteins
  • Insulin-like growth factors

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    Sohlström, A., Katsman, A., Kind, K. L., Roberts, C. T., Owens, P. C., Robinson, J. S., & Owens, J. A. (1998). Food restriction alters pregnancy-associated changes in IGF and IGFBP in the guinea pig. American Journal of Physiology - Endocrinology and Metabolism, 274(3 37-3), E410-E416.